There is no solution.
\(3x+4*{-3\over4}x-2=20\)
Simplify.
\(3x-4*{3\over4}x-2=20\)
Simplify
\(3x-3x-2=20\)
Combine like terms.
\(-2=20\)
The only problem with that answer is that it is incorrect, so therefore x has no solution.